Developmental predictors of students' ability to learn counseling skills would help counselor educators select candidates and assist admitted students in their learning. The present research examined the relationship between adult development, as measured by the Learning Environment Preferences test (W. S. Moore, 1989) and the Defining Issues Test (J. Rest, D. Narvaez, M. J. Bebeau, & S. J. Thoma, 1999), and counseling skills performance, as rated by faculty experts using the Counseling Skills Scale (K. P. Eriksen & G. J. McAuliffe, 2003). Data indicate that adult moral development contributed to 18% of the variance in students' counseling skills performance.